JPH0839663A - Spiral pipe - Google Patents

Abstract

PURPOSE:To prevent the leakage of water from the gaps between a strip like reinforcing material and the strip materials on both sides of a bonded part even during secular use, in a spiral pipe wherein both side parts of the strip like reinforcing material are engaged with ribs fitted with heads, by providing a cut-off means between the strip like materials and the strip like reinforcing material. CONSTITUTION:A spiral pipe is formed by spirally winding a strip like material 1 and engaging the mutually adjacent side edges thereof each other. A strip like reinforcing material 2 covers the engaged part of the engaging recessed part 14 and engaging ridge 11 of the strip like material 1 and both side parts 21 of the strip like reinforcing material 2 are closely bonded to the strip like materials on both sides of the engaged part of the engaging recessed part 14 and the engaging ridge 11 through synthetic rubber packings 17. The bent edges 22 extended from both side parts of the strip like reinforcing material 2 are engaged with the root parts of the flanges 16b of ribs 16. By this structure, if water is leaked from the engaged part of the engaging recessed part 14 and engaging ridge 11 of the strip like material, no water is leaked from the gaps between both side end parts 21 of the strip like reinforcing material 2 and the synthetic rubber packings 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spiral tube formed by spirally winding a band-shaped body and joining side edges adjacent to each other.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Application Publication Sho-64-5
As described in Japanese Patent Laid-Open No. 00502, a spiral tube in which a band-shaped body is spirally wound and joined by bringing side edges adjacent to each other into an engaged state. A plurality of ribs with heads are projected at intervals, and a belt-shaped reinforcing material is coated on the engaging portions of the adjacent side edge portions,
Both end portions of the strip-shaped reinforcing member are brought into close contact with the strip-shaped members on both sides of the engaging portion, and the bent edges extending to both end portions of the strip-shaped reinforcing member are locked to the root portion of the head of the rib with head. Known spiral tubes are known.

[0003]

However, as described above, the spiral tube is a spiral tube in which the strips are spirally wound and the side edges adjacent to each other are brought into engagement with each other to form a spiral tube. Then, a plurality of ribs with heads are projected on the belt-shaped body at intervals, and the belt-shaped reinforcing material is coated on the engaging portions of the adjacent side edge portions, and both side ends of the belt-shaped reinforcing material are covered. In the case of a spiral tube that is closely attached to the strip-shaped members on both sides of the engaging portion, and the bent edges extending to both end portions of the strip-shaped reinforcing member are locked to the roots of the heads of the ribs with heads, Even if both ends of the strip-shaped reinforcing material are in close contact with the strip-shaped bodies on both sides of the engaging portion, both-side ends of the strip-shaped reinforcing material will not be in close contact with the strip-shaped bodies on both sides of the engaging portion due to long-term use. There is a risk of water leakage between the both side ends of the material and the strips on both sides of the engaging portion.

The present invention has been made in view of the above problems in the conventional spiral tube, and an object of the present invention is to solve the problems in the conventional spiral tube, and even after long-term use, a strip shape is obtained. It is an object of the present invention to provide a spiral tube in which there is no risk of water leakage between the reinforcing material and the strips on both sides of the joint.

[0005]

In order to achieve the above object, in the spiral tube according to the present invention as defined in claim 1, the strips are spirally wound and the side edges which are adjacent to each other are engaged with each other. A spiral tube formed by forming a state in which a plurality of ribs with heads are provided on a surface of the band-shaped body facing outward during pipe manufacturing at intervals in the longitudinal direction, and adjacent side edge portions are provided. The belt-shaped reinforcing material is coated on the engaging portions of the two members, the belt-shaped reinforcing material is coated on the side edge portions of the adjacent belt-shaped members, and both side portions of the belt-shaped reinforcing material are locked to the ribs with heads. In the present spiral tube, a water stop means is provided between the strip-shaped body and the strip-shaped reinforcing material.

Further, the spiral tube of the present invention according to claim 2 is a spiral tube formed by spirally winding a band-like body and bringing adjacent side edge portions into an engaged state. hand,
A plurality of ribs with heads are provided on the surface of the strip-shaped body facing outward during pipe manufacturing at intervals, and the main body of the strip-shaped reinforcing material covers the engaging portions of adjacent side edges. Then, both sides of the strip-shaped reinforcing material body are brought into close contact with the strip-shaped bodies on both sides of the engaging portion, and the bent edges extending on both sides of the strip-shaped reinforcing material body are locked to the root portion of the head of the head rib. In the spiral tube that is
Packing is applied to at least one of the close contact portion between both side portions of the strip-shaped reinforcing material body and the strip-shaped bodies on both sides of the engaging portion and the engaging portion between the bent edge of the strip-shaped reinforcing material and the root portion of the head portion of the rib with head. Is intervening.

The spiral tube of the present invention according to claim 3 is a spiral tube formed by spirally winding a band-shaped body and joining adjacent side edges to each other. On the body, a plurality of ribs with heads are provided in the longitudinal direction at intervals on the surface facing outward during pipe making, and the joints between adjacent side edges are inside the groove of the band-shaped reinforcing material with groove. The bent edge extending from the opening of the concave groove portion of the belt-shaped reinforcing member is closely attached to the joint between adjacent side edges of the belt-shaped reinforcing member with concave groove and the vicinity of the opening of the concave groove portion. In a spiral tube locked to the root of the head of a rib with a section, a close contact section between the vicinity of the opening of the groove-like reinforcing member with a groove and a joint between adjacent side edges and a band-like reinforcing material A packing is interposed between at least one of the engaging portion between the curved edge of the head and the base of the head of the headed rib. It is characterized in that there.

In the present invention as set forth in claims 1 to 3, the material of the strip is not particularly limited, and for example, synthetic resin such as hard vinyl chloride resin, polyethylene, polypropylene, nylon is preferably used. It

In the present invention as set forth in claims 1 to 3, the material of the strip-shaped reinforcing material is not particularly limited,
For example, in addition to metals such as steel, stainless steel, and zinc-coated iron plates, synthetic resins such as polycarbonate, nylon, and polyphenylene sulfide (PPS) having relatively high strength are preferably used.

In the present invention according to claim 1, the water stopping means provided between the strip-shaped body and the strip-shaped reinforcing material is not particularly limited. For example, a packing is provided between the strip-shaped body and the strip-shaped reinforcing material. Or a layer of a pressure-sensitive adhesive may be provided, or the band-shaped body and the band-shaped reinforcing material may be bonded with an adhesive.

In the present invention as set forth in claims 2 and 3, the material of the packing is not particularly limited, and for example, a natural or synthetic rubber, or a soft vinyl chloride resin having a relatively high elasticity is suitable. used.

According to the second aspect of the present invention, the packing has a contact portion between both side portions of the main body of the band-shaped reinforcing member and the band-shaped members on both sides of the engaging portion, a bent edge of the band-shaped reinforcing member and a head portion of the rib with a head. It may be interposed in both the base portion and the locking portion, or may be interposed in either one. However, when it is interposed in one side, it is preferable that it is interposed in the close contact portion between both side portions of the strip-shaped reinforcing material main body and both side portions of the engaging portion.

In the present invention as set forth in claim 3, the packing has a close contact portion between the vicinity of the opening of the concave groove portion of the band-shaped reinforcing member with concave groove and a joint portion between adjacent side edge parts, and a bent edge and a head of the band-shaped reinforcing member. It may be interposed in both the locking portion with the root portion of the head of the rib with a portion, or may be interposed in either one. However, when it is interposed on one side, it is preferable that it is interposed on the joint between the side edge portions adjacent to the vicinity of the opening of the concave groove portion of the belt-shaped reinforcing material with concave groove.

[0014]

In the spiral pipe of the present invention according to claim 1, since the water blocking means is provided between the strip-shaped body and the strip-shaped reinforcing material, the space between the strip-shaped body and the strip-shaped reinforcing material can be maintained even after long-term use. There is no danger of water leaking from.

Further, in the spiral pipe of the present invention as defined in claim 2, the close contact portion between both side portions of the strip-shaped reinforcing member and the strip-shaped members on both sides of the engaging portion, and the bent edge of the strip-shaped reinforcing member and the rib with the head portion. Since packing is interposed in at least one of the locking part with the root part of the head, there is no risk of water leaking between the band-shaped reinforcing material and the band-shaped members on both sides of the joint even with long-term use. .

Further, in the spiral pipe of the present invention as set forth in claim 3, the close contact portion between the vicinity of the opening of the concave groove portion of the concave groove portion of the concave groove and the joint portion of the adjacent side edge portions and the belt reinforcing material. Since the packing is interposed in at least one of the engaging portion between the bent edge and the base of the head of the rib with the head,
Even with long-term use, there is no risk of water leaking between the strips on both sides of the joint and the strip reinforcement.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. [Embodiment 1] Embodiments of the invention described in claims 1 and 2 FIG. 1 is an enlarged sectional view of an essential part of an example of the spiral tube of the present invention. In FIG. 1, reference numeral 1 denotes a vinyl chloride resin band-shaped body that constitutes the spiral tube of the present invention, and a tapering engagement projection 11 is formed at one end of the surface of the band-shaped body 1 facing outward during pipe manufacturing. It is erected continuously in the longitudinal direction. The engaging protrusion 11 has a column portion 11a,
An insertion portion 11 having a circular cross section provided at the tip of the column portion 11a.
and b.

On the other end side of the band-shaped body 1, when the band-shaped body 1 is spirally wound, a part of the band-shaped body 1 near the fitting protrusion 11 can be fitted. The step-down portion 12 is formed on the projecting side of the fitting protrusion 11 by the thickness of the step-down portion 12. An inclined rib 13 extending obliquely upward is provided on a side edge portion of the step drop portion 12.

In the middle of the stepped-down portion 12, there is a fitting recess 14 formed in an annular cross section having a space with a circular cross section into which the insertion portion 11b of the fitting projection 11 can be fitted. It is provided so as to project in the same direction as the fitting projection 11 along the longitudinal direction of. A rib 15 having a T-shaped cross section is provided above the fitting groove 14. The rib 15 includes a pillar portion 15a formed in an orthogonal state with respect to the strip 1 and a flange portion 15b provided at the tip of the pillar portion 15a in an orthogonal state with respect to the pillar portion 15a.

A plurality of ribs 16 having a T-shaped cross section are provided between the engaging projection 11 and the fitting recess 13 of the strip 1 in the longitudinal direction of the strip 1 at appropriate intervals. The strip-shaped body 1 is erected integrally along the side. Each rib 16 includes a pillar portion 16a formed in an orthogonal state with respect to the strip 1 and a flange portion 16b (head portion) provided at the tip of the pillar portion 16a in an orthogonal state with respect to the pillar portion 16a. ing. The flange portions 15b and 16b of the ribs 15 and 16 are strip-shaped members 1.
Is formed so as to be located in the same plane substantially parallel to the.

In the belt-shaped body 1, the surface side on which the engaging projections 11, the ribs 15, and the engaging recesses 14 are erected is the outer peripheral side.
As shown in FIG.
It is a spiral tube 20. The pipe-making machine 30 forcibly bends the strip-shaped body 1 introduced therein by a pipe-making roller (not shown), and sequentially winds the strip-shaped body 1 in a spiral shape.
At this time, the other end of the adjacent strip 1 is fitted into the stepped-down portion 12 at one end of the strip 1 that has already been spirally wound, and the strips 1 are superposed. At this time, the engaging projection 11 is fitted and engaged in the engaging recess 14 of the strip 1 that has already been spirally wound. Further, the inclined rib 13 is locked to the root of the flange 16b of the rib 16.

As shown in FIG. 3, reference numeral 2 denotes a channel-shaped reinforcing member made of a coated steel plate. The reinforcing member 2 is supplied to the pipe making machine 30 as shown in FIG. It is supplied so as to cover the engaging portion between the engaging ridge 14 and the engaging ridge 11, and both side portions 21 of the reinforcing material main body 2a engage with the engaging ridge 14 via the synthetic rubber packing 17. The strips 1 and 1 on both sides of the engaging portion with the ridge 11 are closely contacted. Reinforcement body 2a
The bent edges 22 extending from both side portions of the ribs are locked to the root portions of the flange portions 16b of the ribs 16. The synthetic rubber packing 17 may be adhered to the strip 1 or may be integrally formed by a coextrusion molding method when the strip 1 is extruded.

In FIG. 2, reference numeral 31 is a strip uncoiler provided on the ground, and the strip uncoiler 31 supplies the strip 1 to the pipe making machine 30.
Reference numeral 35 is a reinforcing material uncoiler provided above the manhole 45, and the reinforcing material uncoiler 35 supplies the reinforcing material 2 to the pipe manufacturing machine 30. 40 is an existing sewer pipe provided underground, which is lined by the spiral pipe 20 over its entire length.

[Operation of Embodiment 1] The operation of the spiral tube of the present invention shown in FIGS. The reinforcing member 2 covers the engaging portion between the engaging groove 14 of the strip 1 and the engaging protrusion 11, and the both side portions 21 of the reinforcing member main body 2a are connected to the engaging groove 14 via the synthetic rubber packing 17. The bent edges 22 that are in close contact with the strip-shaped bodies 1 and 1 on both sides of the engaging portion with the engaging protrusion 11 and extend from both sides of the reinforcing material body 2a are locked to the base portions of the flange portions 16b of the ribs 16. Therefore, even if water leaks from the engaging portion between the engaging groove 14 and the engaging projection 11 of the strip 1, the reinforcing material main body 2
Water does not leak from between both end portions 21 of a and the packing 17 made of synthetic rubber.

[Embodiment 2: Embodiment of the invention described in claim 1] FIG. 4 is an enlarged sectional view of an essential part of another example of the spiral tube of the present invention. In the spiral tube of the present invention shown in FIG. 4, the engaging protrusion 11 provided on the side edge of the strip 1 is provided with a column 11a and an insertion portion 11b having a semicircular cross section at its tip, and the adjacent strips are formed. The engaging ridges 11 of the body 1 are fitted into the concave groove portions 21a of the band-shaped reinforcing material 2 with concave grooves, and the bent edges extending laterally and in the openings of the concave groove portions 21a of the band-shaped reinforcing material 2 with concave grooves. Part 22
The packing 1 from the vicinity of the base of the engaging projection 11 of the strip 1 adjacent to the base 1 to the base of the adjacent rib 16 with a head.
7a and 7b, and the tip of the bent edge portion 22 of the strip-shaped reinforcing member 2 is projected in the middle of the rib 16 with a head.
It was locked to.

[Operation of Embodiment 2] In the spiral pipe of the present invention shown in FIG. 4, the opening of the concave groove portion 21a of the belt-shaped reinforcing member 2 with concave groove and the bent edge portion 22 extending laterally are adjacent to each other. From the vicinity of the root of the engaging projection 11 of the band-shaped body 1 to the root of the adjacent rib 16 with a head, it is closely contacted via the packing 17, and the tip of the bent edge portion 22 of the band-shaped reinforcing member 2 is a rib with a head. Since it is locked to the protruding strip 16c provided in the middle of 16, the water leakage between the joint between the adjacent strips 1 and the strip-shaped reinforcing member 2 is prevented.

[Embodiment 3: Embodiment of the invention described in claim 1] FIG. 5 is an enlarged sectional view of a main part of still another example of the spiral tube of the present invention. In the spiral pipe of the present invention shown in FIG. 5, the engaging projection 11 provided on the side edge portion of the strip 1 has a column portion 11a.
And an insertion portion 11b having a semicircular cross section at the tip thereof, and the insertion portion 11b is inserted into and engaged with the engagement groove 14 of the adjacent band-shaped body 1 so as to project to the side of the engagement groove 14. The inclined ribs 13 are locked to the roots of the heads of the ribs 16 with heads of the adjacent strips 1.

The surface of the rib 16 with a head is covered with the main body 2a of the strip-shaped reinforcing material 2a, and one side edge of the main body 2a of the strip-shaped reinforcing material is brought into close contact with the base of the inclined rib 13 through the packing 17. A bent edge in which one side edge of the channel-shaped strip reinforcement body 2a is brought into close contact with the vicinity of the base of the rib 16 with a head via a packing 17 and extends from one side edge of the channel strip reinforcement body 2a. The portion 22 is locked to the base portion of the rib 15 projecting above the engaging groove 14 via the packing 17,
A bent edge portion 22 extending from the other side edge is locked to a base portion of a head portion of the rib 16 via a packing 17.

[Operation of Embodiment 3] In the spiral tube of the present invention shown in FIG. 5, the surface of the rib 16 with a head is covered with the main body 2a of the strip-shaped reinforcing material, and one of the main bodies 2a of the strip-shaped reinforcing material 2a is covered. The side edge is brought into close contact with the base portion of the inclined rib 13 via the packing 17, and one side edge of the groove-shaped strip-shaped reinforcing member main body 2a is brought into close contact with the vicinity of the base portion of the rib 16 with a head via the packing 17, A bent edge portion 22 extending from one side edge of the strip-shaped reinforcing material main body 2a is locked to a base portion of a rib 15 protruding above the engaging groove 14 via a packing 17, and The bent edge portion 22 extending from the side edge has the rib 16
Since it is locked to the base portion of the head of the belt via the packing 17, water leakage between the joint between the end portions of the adjacent belt-shaped bodies 1 and the belt-shaped reinforcing member 2 is prevented.

[Embodiment 4: Embodiment of the Invention According to Claims 1 and 3] FIG. 6 is an enlarged sectional view of a main part of still another example of the spiral tube of the present invention. In the spiral tube of the present invention shown in FIG. 6, the engaging projection 11 provided on the side edge portion of the strip 1 is provided with the column portion 11.
a and an insertion portion 11b having a semicircular cross section at the tip thereof, the engaging projections 11 of the adjacent strips 1 are fitted into the recessed groove portions 21a of the strip-shaped reinforcing material 2 with recessed grooves, and the strip-shaped reinforcement with recessed grooves is provided. The opening of the concave groove portion 21a of the member 2 is brought into close contact with the vicinity of the base of the engaging projection 11 of the adjacent strip 1 via the packing 17, and the tip of the bent edge portion 22 of the strip reinforcing member 2 is a rib with a head. It is locked to the base of 16 heads.

[Operation of Embodiment 4] In the spiral tube of the present invention shown in FIG. 6, the base of the engaging projection 11 of the strip 1 adjacent to the opening of the recess 21a of the strip-shaped reinforcing member 2 with recess. Since the tip of the bent edge portion 22 of the strip-shaped reinforcing member 2 is locked to the vicinity of the head portion of the rib 16 with a head portion by being closely contacted via a packing 17, the joint portion of the adjacent strip body 1 is Water leakage between the belt-shaped reinforcing member 2 is prevented.

The embodiments of the present invention have been described above with reference to the drawings. However, the specific configuration of the present invention is not limited to the illustrated embodiments, and design changes within the scope not departing from the gist of the present invention are subject to change. Included in the invention. For example, as in the embodiment shown in FIG. 1, the engaging ridges and the engaging ridges may be oriented in a direction parallel to the width direction of the strip, instead of being projected perpendicularly to the strip. . Further, the engaging portions of the engaging protrusions and the engaging recesses may be adhered by an adhesive.

[0033]

According to the spiral pipe of the present invention as set forth in claim 1, since the water blocking means is provided between the strip and the strip-like reinforcing member, the strip-like body and the strip-like reinforcing member can be used even after long-term use. There is no danger of water leaking between them.

Further, in the spiral pipe of the present invention as defined in claim 2, the close contact portion between both side portions of the strip-shaped reinforcing member and the strip-shaped members on both sides of the engaging portion, and the bent edge of the strip-shaped reinforcing member and the rib with a head are formed. Since packing is interposed in at least one of the locking part with the root part of the head, there is no risk of water leaking between the band-shaped reinforcing material and the band-shaped members on both sides of the joint even with long-term use. .

Further, in the spiral pipe of the present invention as set forth in claim 3, the close contact between the vicinity of the opening of the concave groove portion of the concave groove portion of the concave groove portion and the joint portion of the adjacent side edge portions and the belt reinforcing material. Since the packing is interposed in at least one of the engaging portion between the bent edge and the base of the head of the rib with the head,
Even with long-term use, there is no risk of water leaking between the strips on both sides of the joint and the strip reinforcement.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of an essential part of an example of a spiral tube of the present invention.

FIG. 2 is an explanatory view showing a mode of forming a spiral tube.

FIG. 3 is a perspective view of a reinforcing material used in the spiral tube of the present invention shown in FIG.

FIG. 4 is an enlarged sectional view of a main part of another example of the spiral tube of the present invention.

FIG. 5 is an enlarged cross-sectional view of a main part of still another example of the spiral tube of the present invention.

FIG. 6 is an enlarged sectional view of a main part of still another example of the spiral tube of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 strip | belt-shaped body 11 engagement protrusion 11a support | pillar part 11b insertion part 12 step fall part 13 inclined rib 14 engagement recessed line 15 rib 16 rib 16a support | pillar part 16b flange part (head part) 17 packing 2 strip | belt-shaped reinforcement 2a strip-shaped reinforcement Body 21 Both sides 22 Bending edge

Claims (3)

[Claims] 1. A spiral tube which is formed by spirally winding a band-shaped body and bringing adjacent side edges into engagement with each other, wherein the band-shaped body faces outwardly during pipe manufacturing. A plurality of ribs with heads are projected on the surface at intervals and in the longitudinal direction,
The belt-shaped reinforcing material is coated on the engaging portions of the adjacent side edge portions, the belt-shaped reinforcing material is coated on the side edge portions of the adjacent belt-shaped bodies, and both side portions of the belt-shaped reinforcing material are ribs with heads. A spiral tube locked to a spiral tube, wherein water stop means is provided between the band-shaped body and the band-shaped reinforcing material. 2. A spiral tube formed by spirally winding a band-shaped member and engaging adjacent side edge portions with each other, wherein the band-shaped member faces outwardly during pipe manufacturing. A plurality of ribs with heads are projected on the surface at intervals and in the longitudinal direction,
The strip-shaped reinforcing material body is covered on the engaging portions of the adjacent side edge portions, and both side portions of the strip-shaped reinforcing material body are brought into close contact with the strip-shaped bodies on both sides of the engaging portion and extend to both side portions of the strip-shaped reinforcing material body. In a spiral tube in which the bent edge provided is locked to the root of the head of the rib with a head, a close contact portion between both side portions of the main body of the strip-shaped reinforcement member and the strip-shaped members on both sides of the engagement portion and the strip-shaped reinforcement member A spiral tube, wherein packing is interposed in at least one of an engaging portion between a bent edge of the head and a base portion of a head portion of a rib with a head portion. 3. A spiral tube formed by spirally winding a band-shaped body and joining adjacent side edge parts to each other, wherein the band-shaped body has a plurality of surfaces facing outward during pipe manufacturing. Ribs with heads are projected in the longitudinal direction at intervals, and the joints between adjacent side edges are fitted into the groove of the band-shaped reinforcing material with concave groove, and The vicinity of the opening of the groove is in close contact with the joint between the adjacent side edges, and the bent edge extending from the vicinity of the opening of the concave groove of the band-shaped reinforcing member is locked to the base of the head of the rib with head. In the spiral tube that is
A part of the grooved reinforcing material with concave groove close to the opening of the groove and the contact portion between the adjacent side edges, and an engaging portion between the bent edge of the belt reinforcing material and the root of the head of the rib with head. A spiral tube having packing interposed in at least one of the above.